package com.Liux.servlet.user;

import com.Liux.pojo.User;
import com.Liux.service.user.UserService;
import com.Liux.service.user.UserServiceImpl;
import com.Liux.util.Constants;
import org.omg.PortableInterceptor.USER_EXCEPTION;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.sql.Connection;

public class LoginServlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        System.out.println("Loginservlet ---start----");

        //获取用户名和登录密码
        String userCode = req.getParameter("userCode");
        String userPassword = req.getParameter("userPassword");

        //和数据库中的密码进行对比，调用业务层
        UserService userService =  new UserServiceImpl();
        User user = userService.login(userCode,userPassword); // 这里已经把登录的人给查出来了
        System.out.println(userService.login(userCode,userPassword));
        if(user != null){
            //将用户的信息放到Session中
            req.getSession().setAttribute(Constants.USER_SESSION,user);
            //跳转到主页
            resp.sendRedirect("jsp/frame.jsp");
        }
        else{ //查无此人，无法登录
            // 转发回登录页面，顺带提示他，用户名或密码错误
            req.setAttribute("error","用户名或者密码错误");
            req.getRequestDispatcher("login.jsp").forward(req,resp);

        }
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doGet(req, resp);
    }
}
